Log in

Relevant bibliographies by topics / Concrete age / Journal articles

To see the other types of publications on this topic, follow the link: Concrete age.

Journal articles on the topic 'Concrete age'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Concrete age.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Schindler, Anton, Benjamin Byard, and Aravind Tankasala. "Mitigation of early-age cracking in concrete structures." MATEC Web of Conferences 284 (2019): 07005. http://dx.doi.org/10.1051/matecconf/201928407005.

Full text

Abstract:

Early-age cracking can adversely affect the behavior and durability of concrete elements. This paper will cover means to mitigate early-age cracking in concrete bridge decks and mass concrete elements. The development of in-place stresses is affected by the shrinkage, coefficient of thermal expansion, setting characteristics, restraint conditions, stress relaxation, and temperature history of the hardening concrete. The tensile strength is impacted by the cementitious materials, the water-cementitious materials ratio, the aggregate type and gradation, the curing (internal/external) provided, a

APA, Harvard, Vancouver, ISO, and other styles

2

Koyankin, A. A., and V. M. Mitasov. "JOINTS IN CONCRETES OF DIFFERENT AGE AND TYPE." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 22, no. 6 (2020): 94–104. http://dx.doi.org/10.31675/1607-1859-2020-22-6-94-104.

Full text

Abstract:

The performance and structural reliability of concrete-to-concrete joints play an important role in precast-cast-in-place constructions, since they are responsible for deformation of concretes of different age, type and strength. The paper studies the effect of the joint type on its bearing capacity under shear loads. A horizontal test bench and a standard vertical press are used in the experiment to provide the shear load along the concrete-to-concrete joint (light cast-situ and heavy precast concretes). The following joint installing is considered: a smooth surface, which provides the concre

APA, Harvard, Vancouver, ISO, and other styles

3

Chen, Bo, Jian Tong Ding, and Yue Bo Cai. "Influence of Aggregates on Cracking Resistance of Concrete at Early Age." Applied Mechanics and Materials 151 (January 2012): 474–79. http://dx.doi.org/10.4028/www.scientific.net/amm.151.474.

Full text

Abstract:

In order to investigate influence of aggregates on cracking resistance of concrete at early age, four kinds of aggregates, i.e. syenite, basalt, marble and sandstone, were used for the test on cracking resistance of hydraulic concretes by the temperature stress testing machine. Analogy analysis was carried out with test results of concretes with two gradings of aggregates. The results show that aggregates affect elastic modulus, thermal expansion coefficients and tensile creep behavior of concrete at early age. However, the temperature rise of concrete was slightly affected by various types an

APA, Harvard, Vancouver, ISO, and other styles

4

Jin, Hu. "Late-Age Properties of Concrete with Different Binders Cured under 45°C at Early Ages." Advances in Materials Science and Engineering 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/8425718.

Full text

Abstract:

It is commonly accepted that high curing temperature (near 60°C or above) results in reduced mechanical properties and durability of concrete compared to normal curing temperature. The internal temperature of concrete structures at early ages is not so high as 60°C in many circumstances. In this paper, concretes were cured at 45°C at early ages and their late-age properties were studied. The concrete cured at 20°C was employed as the reference sample. Four different concretes were used: plain cement concrete, concrete containing fly ash, concrete containing ground granulate blast furnace slag

APA, Harvard, Vancouver, ISO, and other styles

5

Holt, Erika E., and Donald J. Janssen. "Influence of Early Age Volume Changes on Long-Term Concrete Shrinkage." Transportation Research Record: Journal of the Transportation Research Board 1610, no. 1 (1998): 28–32. http://dx.doi.org/10.3141/1610-05.

Full text

Abstract:

Volume changes can occur in concrete during the first 24 hr and are generally missed in laboratory shrinkage evaluations. Unfortunately these early age volume changes are present in real pavements and structures and can contribute to the cracking behavior of the concrete at later ages. Early age volume changes can occur in two forms: drying shrinkage before the start of curing and autogenous volume changes. Although these early age volume changes are often dismissed as being insignificant, recent work in Europe has identified magnitudes for early age volume changes of some concretes that are e

APA, Harvard, Vancouver, ISO, and other styles

6

Tichý, Jan, Pavel Kasal, Václav Lorenc, Petr Cikrle, and Dalibor Kocáb. "Measurement of Early-Age Strength of Concrete." Solid State Phenomena 309 (August 2020): 98–102. http://dx.doi.org/10.4028/www.scientific.net/ssp.309.98.

Full text

Abstract:

Construction company Skanska a.s. is active in the field of reinforcement structures. Skanska finds measuring of early-age compressive strength very important because of removing of the formwork. This paper deals with three nondestructive methods for estimating compressive strength. Skanska started a collaboration with institute of building testing FAST VUT at the beginning of the year. Collaboration was focused on measuring of early-age strength of concrete with rebound hammer SilverSchmidt PC L. The paper includes the equation for calculation of compressive strength of C 30/37 XC4 from the r

APA, Harvard, Vancouver, ISO, and other styles

7

Li, Yun Feng, Rong Qiang Du, and Fan Ying Kong. "Analysis of Concrete Early-Age Shrinkage Based on the Theory of Humidity Diffusion." Key Engineering Materials 462-463 (January 2011): 183–87. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.183.

Full text

Abstract:

The early-age shrinkage cracking of concrete plays an important role to the accelerated deterioration and shortening the service life of concrete structures. Modern concretes are more sensitive to cracking immediately after setting, which is due to material characteristics (lower water/binder ratio and higher cement content) and external environmental fluctuations (humidity and temperature change). Determination of concrete free shrinkage is the basis of shrinkage cracking research. Analytical models of the autogenous shrinkage and drying shrinkage are established in this paper. The calculated

APA, Harvard, Vancouver, ISO, and other styles

8

Wendner, Roman, Kresimir Nincevic, Ioannis Boumakis, and Lin Wan. "Age-Dependent Lattice Discrete Particle Model for Quasi-Static Simulations." Key Engineering Materials 711 (September 2016): 1090–97. http://dx.doi.org/10.4028/www.scientific.net/kem.711.1090.

Full text

Abstract:

For decades, concrete plays an important role worldwide as a structural material. Construction planning and reliability assessment require a thorough insight of the effects that determine concrete lifetime evolution. This study shows the experimental characterization as well as the results of subsequent aging simulations utilizing and coupling a Hygro-thermo-chemical (HTC) model and the Lattice Discrete Particle Model (LDPM) with aging effects for concretes at various early ages. The HTC component of the computational framework allows taking into account any form of environmental curing condit

APA, Harvard, Vancouver, ISO, and other styles

9

Winters, James B., and Charles W. Dolan. "Concrete breakout capacity of cast-in-place concrete anchors in early-age concrete." PCI Journal 59, no. 1 (2014): 114–31. http://dx.doi.org/10.15554/pcij.01012014.114.131.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Kitouni, S., and H. Houari. "Lightweight concrete with Algerian limestone dust: Part I: Study on 30% replacement to normal aggregate at early age." Cerâmica 59, no. 352 (2013): 600–608. http://dx.doi.org/10.1590/s0366-69132013000400017.

Full text

Abstract:

The mechanical characteristics of the lightweight aggregate concretes (LWAC) strongly depend on the proportions of aggregates in the formulation. In particular, because of their strong porosity, the lightweight aggregates are much more deformable than the cementations matrix and their influence on concrete strength is complex. This paper focuses on studying the physical performance of concrete formulated with substitution of 30% of coarse aggregates by limestone dust. In this article an attempt is made to provide information on the elastic properties of lightweight concrete (LWC) from tests ca

APA, Harvard, Vancouver, ISO, and other styles

11

Piladaeng, Nawarat, Niwat Angkawisittpan, and Sahalaph Homwuttiwong. "Determination of Relationship between Dielectric Properties, Compressive Strength, and Age of Concrete with Rice Husk Ash Using Planar Coaxial Probe." Measurement Science Review 16, no. 1 (2016): 14–20. http://dx.doi.org/10.1515/msr-2016-0003.

Full text

Abstract:

Abstract This paper deals with an investigation of the dielectric properties of concretes that includes rice husk ash using a planar coaxial probe. The planar coaxial probe has a planar structure with a microstrip and coaxial features. The measurement was performed over the frequency range of 0.5-3.5 GHz, and concrete specimens with different percentages of rice husk ash were tested. The results indicated that the dielectric constant of the concretes was inversely proportional to the frequency, while the conductivity was proportional to the frequency. The dielectric constant decreased with the

APA, Harvard, Vancouver, ISO, and other styles

12

Wang, Yan, Sheng Xing Wu, Shuo Chen, Yao Wang, and Bao Long Wei. "Experimental Study on Acoustic Emission Characteristics of Splitting Damage Processes for Different Ages of Concrete." Applied Mechanics and Materials 105-107 (September 2011): 976–80. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.976.

Full text

Abstract:

A total of 18 specimens’ damage processes of concrete under split load in 1d, 3d, 5d, 7d, 14d and 28d ages are monitored by acoustic emission (AE) technique and corresponding typical AE characteristics are summarized. The results show that splitting tensile strength of concrete and the number of AE hits are both showing a gradual increase with the growth of age. During the process of splitting failure of concrete specimens in 14d and 28d, AE hits in higher duration and amplitude are collected, It shows that the older concretes tends to release more energy, at last, AE parameters which are in h

APA, Harvard, Vancouver, ISO, and other styles

13

Nguyen, Thi-Thuy-Hang, Duc-Hung Phan, Hong-Ha Mai, and Duy-Liem Nguyen. "Investigation on Compressive Characteristics of Steel-Slag Concrete." Materials 13, no. 8 (2020): 1928. http://dx.doi.org/10.3390/ma13081928.

Full text

Abstract:

The compressive characteristics of the steel-slag concrete were investigated through an experimental test. The term “steel-slag concrete” in this research work was defined as a kind of concrete using steel-slag material as a coarse aggregate replacement. Three types of the steel-slag concretes were examined under compression as follows: XT01, XT02, XT03 with their cement/water ratios of 1.76, 2.00, 2.21, respectively. The coarse aggregate used in producing concrete was steel-slag material, while the fine aggregate was traditional river sand; the ratio of coarse aggregate to fine aggregate was

APA, Harvard, Vancouver, ISO, and other styles

14

Mao, Ming Jie, Qiu Ning Yang, Wen Bo Zhang, and Isamu Yoshitake. "Fly-Ash Concretes of 50% of the Replacement Ratio to Reduce the Cracking in Concrete Structures." Applied Mechanics and Materials 405-408 (September 2013): 2665–70. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.2665.

Full text

Abstract:

Fly-ash concrete used in massive concrete structure has superior advantages to reduce hydration heat. On the other hand, the fly-ash concrete has negative property of low strength development at early age because pozzolanic reaction of fly-ash activates at mature age, such as after 28 days. To investigate these characteristics of fly-ash used in concrete, the present study discusses thermal cracking possibility of fly-ash concrete by using FE analysis software. The present study employs prediction formulae proposed by Zhang and Japanese design code in the simulations. The objects in this study

APA, Harvard, Vancouver, ISO, and other styles

15

Kovler, Konstantin, David A. Lange, and Henrik Stang. "Early age concrete––properties and performance." Cement and Concrete Composites 26, no. 5 (2004): 413–15. http://dx.doi.org/10.1016/j.cemconcomp.2004.04.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Storozhuk, M. A., T. M. Pavlenko, and A. R. Abbasova. "REGULARITIES OF FORMING THE STRUCTURAL STRENGTH OF VACUUM CONCRETE WHEN COMPACTING CONCRETE MIXES." Bulletin of Odessa State Academy of Civil Engineering and Architecture, no. 81 (December 7, 2020): 139–48. http://dx.doi.org/10.31650/2415-377x-2020-81-139-148.

Full text

Abstract:

Abstract. The paper presents the results of theoretical and experimental studies of structural strength and strength at the age of 28 days of vibrovacuumized and vibrated concrete. Structural strength is very important when moulding prefabricated or monolithic structures with immediate dismantling. Regularities of removal of a part of tempering water (liquid phase) from vibrovacuumized concrete mix, having capillaries of various form (round, square, formed by three or four cylinders), narrowing and expanding capillaries, and also capillaries of variable cross-section (with areas that expand an

APA, Harvard, Vancouver, ISO, and other styles

17

Guo, Jinjun, Zheng Zhang, Jingjiang Wu, et al. "Early-Age Mechanical Characteristics and Microstructure of Concrete Containing Mineral Admixtures under the Environment of Low Humidity and Large Temperature Variation." Materials 14, no. 17 (2021): 5085. http://dx.doi.org/10.3390/ma14175085.

Full text

Abstract:

The application of concrete containing mineral admixtures was attempted in Northwest China in this study, where the environment has the characteristics of low humidity and large temperature variation. The harsh environment was simulated by using an environmental chamber in the laboratory and four types of concrete were prepared, including ordinary concrete and three kinds of mineral admixture concretes with different contents of fly ash and blast-furnace slag. These concretes were cured in the environmental chamber according to the real curing conditions during construction. The compression st

APA, Harvard, Vancouver, ISO, and other styles

18

Mussa, Mohamed H., Ahmed M. Abdulhadi, Imad Shakir Abbood, Azrul A. Mutalib, and Zaher Mundher Yaseen. "Late Age Dynamic Strength of High-Volume Fly Ash Concrete with Nano-Silica and Polypropylene Fibres." Crystals 10, no. 4 (2020): 243. http://dx.doi.org/10.3390/cryst10040243.

Full text

Abstract:

The dynamic behaviour of high-volume fly ash concrete with nano-silica (HVFANS) and polypropylene fibres at curing ages of 7 to 90 days was determined by using a split Hopkinson pressure bar (SHPB) machine. At each curing age, the concrete samples were laboratory tested at different temperatures conditions under strain rates reached up to 101.42 s−1. At room temperature, the results indicated that the dynamic compressive strength of plain concrete (PC) was slightly higher than HVFANS concrete at early curing ages of 7 and 28 days, however, a considerable improvement in the strength of HVFANS c

APA, Harvard, Vancouver, ISO, and other styles

19

Lim, Jian Chin. "Influence of Concrete Age on Compressive Behavior of FRP-Confined Concrete." Applied Mechanics and Materials 744-746 (March 2015): 162–68. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.162.

Full text

Abstract:

This paper presents the results of an experimental study on the influence of concrete age on the compressive behavior of fiber reinforced polymer (FRP)-confined normal-strength (NSC) and high-strength concrete (HSC). The first part of the paper presents the results of 18 FRP-confined and 18 unconfined concrete specimens tested at 7 and 28 days. To extend the investigation with specimens with concrete ages up to 900 days, existing test results of FRP-confined concrete was assembled from the literature. Based on observations from both short-and long-term influences of concrete age on compressive

APA, Harvard, Vancouver, ISO, and other styles

20

Turuallo, Gidion, and Harun Mallisa. "Sustainable cementitious materials: The effect of fly ash percentage as a part replacement of portland cement composite (PCC) and curing temperature on the early age strength of fly ash concrete." MATEC Web of Conferences 258 (2019): 01001. http://dx.doi.org/10.1051/matecconf/201925801001.

Full text

Abstract:

This research aims to determine the effect of fly ash percentage as a part replacement of Portland cement and curing temperatures to the early age strength of concrete. The percentages of fly ash used were 0, 10 and 15% by cement weight. The cured temperatures were 25, 30 dan 50°C. The concrete specimens were cubes of 150 x 150 x 150 mm3. The cubes, which were cured at 25°C, placed in water tank, while those cured at 30 and 50°C cured in oven until 7 days and then continued in water. The testing was conducted at ages 3, 7, 14 dan 28 days. The results showed that at early ages, the strength of

APA, Harvard, Vancouver, ISO, and other styles

21

Kim, Seong-Min, Patricia Kim Nelson, Mauricio Ruiz, Robert Otto Rasmussen, and Dennis Turner. "Early-Age Behavior of Concrete Overlays on Continuously Reinforced Concrete Pavements." Transportation Research Record: Journal of the Transportation Research Board 1823, no. 1 (2003): 80–92. http://dx.doi.org/10.3141/1823-10.

Full text

Abstract:

Delamination is the primary mode of distress in most bonded concrete overlay (BCO) projects. The objective of the present study was to develop and calibrate a mechanistic delamination model to properly predict the early-age behavior of concrete overlays bonded to continuously reinforced concrete pavements (CRCPs). An experimental BCO on a CRCP section was constructed to monitor its behavior, and the field data were used to calibrate the mechanistic models. Two- and three-dimensional finite element models of the BCO on CRCPs were developed and calibrated. The results from the numerical analysis

APA, Harvard, Vancouver, ISO, and other styles

22

Huang, Xin Min, and Cheng Yong Yang. "Early-Age Concrete Cover Crack and Its Effects on Concrete Cover." Key Engineering Materials 302-303 (January 2006): 630–36. http://dx.doi.org/10.4028/www.scientific.net/kem.302-303.630.

Full text

Abstract:

The influence of early-age crack on concrete cover was studied in this paper. Cracks in concrete increase the permeability of concrete, the section where cracking occurs should be treated as getting thinner. The formation and propagation mechanism of the early-age cover crack, and cover crack depth were two main topics, which were discussed mainly based on the dual boundary element method. At last, the ultimate analytical method was used to determine the minimum thickness of concrete cover.

APA, Harvard, Vancouver, ISO, and other styles

23

Maruyama, Ippei, and Pietro Lura. "Properties of early-age concrete relevant to cracking in massive concrete." Cement and Concrete Research 123 (September 2019): 105770. http://dx.doi.org/10.1016/j.cemconres.2019.05.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Kim, Min Ook, and Amanda C. Bordelon. "Age-dependent properties of fiber-reinforced concrete for thin concrete overlays." Construction and Building Materials 137 (April 2017): 288–99. http://dx.doi.org/10.1016/j.conbuildmat.2017.01.097.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Golewski, Grzegorz L., and Tomasz Sadowski. "Experimental Investigation and Numerical Modeling Fracture Processes under Mode II in Concrete Composites Containing Fly-Ash Additive at early Age." Solid State Phenomena 188 (May 2012): 158–63. http://dx.doi.org/10.4028/www.scientific.net/ssp.188.158.

Full text

Abstract:

Mode II fracture analysis is especially important. This mode is vital in relation to concrete, due to its relatively low shearing strength and high sensitivity to such type of stress. Nowadays, the structural concretes containing an additives of fly-ash are quite commonly used in the construction industry. Initial cracks origin and development research was carried out using samples for three concrete mixtures: concrete without silica fly-ash (FA), concrete with 20% and concrete with 30% FA additive. 150x150x150 concrete cube with two initial cracks was used as a test sample. Experimental inves

APA, Harvard, Vancouver, ISO, and other styles

26

Qian, Xiao Qian, Shu Lin Zhan, and Yao Tai Zhu. "Influence of Superplasticizer and Shrinkage-Reducing Admixtures on Early Age Shrinkage of Concrete." Key Engineering Materials 405-406 (January 2009): 166–73. http://dx.doi.org/10.4028/www.scientific.net/kem.405-406.166.

Full text

Abstract:

The influence of superplasticizer (SP) and shrinkage-reducing admixtures (SRA) on the early age shrinkage of concrete with a controlled slump of 80±10 mm was investigated using a measuring apparatus developed specially. In addition, the influence of early age curing methods on the early age shrinkage of concrete was also studied. The early age shrinkage was increased sharply by the addition of SP when the concrete was exposed to the drying environment after initial setting. While under the same conditions the addition of SRA could reduce the early age shrinkage effectively. However, under seal

APA, Harvard, Vancouver, ISO, and other styles

27

Raach, Y., Y. Derouiche, and F. Messelmi. "Influence of concrete age on the behavior of ultrasonic waves in interfaces (concrete–steel–concrete)." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 21 (2020): 4239–57. http://dx.doi.org/10.1177/0954406220921196.

Full text

Abstract:

This paper presents the influence of the composite age on the variation of the transmission and reflection coefficients. The composite is the concrete in our case. The studied structure is a multilayer structure composed of two elastic and isotropic layers where each one is characterized by its own physical properties. The problem is simplified in two-dimensional plane waves, and the influence of the attack angle on the acoustic impedances is also examined. Moreover, an experimental study is realized in the formulation of concrete and the measurement of waves propagation velocity. In this work

APA, Harvard, Vancouver, ISO, and other styles

28

Michałowska-Maziejuk, Dorota, and Barbara Goszczyńska. "Assessment of the early-age compressive strength of concrete." Budownictwo i Architektura 20, no. 2 (2021): 005–14. http://dx.doi.org/10.35784/bud-arch.2018.

Full text

Abstract:

This paper analyses the results of concrete compressive strength tests on cubic samples with different w/c ratios during the early stage of hardening (at 7, 14, and 28 days). Statistical and strength parameters were assessed and the quality of the concrete was estimated. The expected concrete grade, C25/30, was confirmed against the formulation provided by the prefabrication plant. Then, the amount of individual constituents was adjusted to obtain the target grade of concrete, i.e., C20/25. The concrete grade was estimated based on concrete strength parameters measured at three time points and

APA, Harvard, Vancouver, ISO, and other styles

29

Zhang, Shou Zhi, Ting Yao, Qian Tian, and Fei Guo. "The Research on Early Age Deformation of Shrinkage-Compensating Concrete." Advanced Materials Research 785-786 (September 2013): 287–90. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.287.

Full text

Abstract:

Measuring techniques for vertical deformation and horizontal deformation of concrete were introduced in the paper. Based on these techniques, concrete deformation about reference concrete and shrinkage-compensating concrete were studied. The results show that workability of concrete was almost not affected by expansive agent. Usually deformation testing began when the mold has been removed 24 hours after casting according to present standard, but the reaserch shows that the time of starting measurement has a little influence on deformation of reference concrete, while its vastly affected on th

APA, Harvard, Vancouver, ISO, and other styles

30

Shi, Nan Nan, and Da Hai Huang. "Experimental Study on Early-Age Crack of RC Using TSTM." Advanced Materials Research 919-921 (April 2014): 119–22. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.119.

Full text

Abstract:

Thermal stress is a major cause of early-age crack of massive concrete structures. In order to analyze the influencing factors of concrete crack under thermal loads, a series of tests were conducted using the improved Temperature Stress Testing Machine (TSTM). Effects of temperature on crack resistance of concrete were studied on different concrete placing temperatures and curing temperatures. Meanwhile, the roles of reinforcement on concrete crack resistance and crack-width limitation were quantitative analyzed, which compare cracks of plain concrete and reinforced concrete with the same mix

APA, Harvard, Vancouver, ISO, and other styles

31

Jensen, Elin A., and Will Hansen. "Fracture Energy Test for Highway Concrete: Determining the Effect of Coarse Aggregate on Crack Propagation Resistance." Transportation Research Record: Journal of the Transportation Research Board 1730, no. 1 (2000): 10–17. http://dx.doi.org/10.3141/1730-02.

Full text

Abstract:

Portland cement concrete fracture properties—specific fracture energy, fracture toughness, and brittleness—were investigated for typical Michigan highway concretes containing different coarse aggregates and varying in age: 7,28, and 91 days. These fracture properties can be determined from the complete load-deflection curve of a notched beam. The effective beam is 965 mm long, 100 mm wide, and 200 mm high, with a 100-mm center notch. Results show that the specific fracture energy, which determines the resistance to crack propagation, for a concrete pavement mix is controlled primarily by the c

APA, Harvard, Vancouver, ISO, and other styles

32

Ullah, Farid, Fahim Al-Neshawy, and Jouni Punkki. "Early Age Autogenous Shrinkage of Fibre Reinforced Concrete." Nordic Concrete Research 59, no. 1 (2018): 59–72. http://dx.doi.org/10.2478/ncr-2018-0015.

Full text

Abstract:

Abstract Concrete is often sensitive to cracking during the hardening process, and these cracks could be the result of early-age shrinkage. One method to reduce shrinkage is to add different types of fibres to concrete. The aim of this study was to study the effects of different types of fibres on the early-age autogenous shrinkage of concrete. Three different types of fibre materials were used in the research. A “Schleibinger Bending-drain” test setup was used to record early-age autogenous shrinkage of fresh concrete immediately after mixing. The results show that, a fibre dosage of 0.38% by

APA, Harvard, Vancouver, ISO, and other styles

33

Bittermann, Thomas, and Kersten Latz. "Early-Age Concrete Cracking in Composite Bridges." IABSE Symposium Report 96, no. 7 (2009): 92–101. http://dx.doi.org/10.2749/222137809796078568.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Bertagnoli, G., G. Mancini, and F. Tondolo. "Numerical modelling of early-age concrete hardening." Magazine of Concrete Research 61, no. 4 (2009): 299–307. http://dx.doi.org/10.1680/macr.2008.00071.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Bertagnoli, Gabriele, Giuseppe Mancini, and Francesco Tondolo. "Early age cracking of massive concrete piers." Magazine of Concrete Research 63, no. 10 (2011): 723–36. http://dx.doi.org/10.1680/macr.2011.63.10.723.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Baiburin, A. Kh. "Technology of the Early Age Concrete Loading." Procedia Engineering 150 (2016): 2157–62. http://dx.doi.org/10.1016/j.proeng.2016.07.257.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Benboudjema, F., and J. M. Torrenti. "Early-age behaviour of concrete nuclear containments." Nuclear Engineering and Design 238, no. 10 (2008): 2495–506. http://dx.doi.org/10.1016/j.nucengdes.2008.04.009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Hauggaard, Anders Boe, Lars Damkilde, and Per Freiesleben Hansen. "Transitional Thermal Creep of Early Age Concrete." Journal of Engineering Mechanics 125, no. 4 (1999): 458–65. http://dx.doi.org/10.1061/(asce)0733-9399(1999)125:4(458).

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Wang, Ai Kai, Ya Dong Xue, Rui Wang, et al. "Experimental Study on Thermal Expansion Properties and Micro-Pore Texture of High Strength Concrete in Early Age." Advanced Materials Research 250-253 (May 2011): 497–501. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.497.

Full text

Abstract:

The early age cracking of concrete is concerned with its thermal expansion properties, which is mainly reflected by the thermal expansion coefficient. Reasonably controlling the coefficient is an effective way of reducing cracks in the early age of concrete. While thermal expansion properties are related to the micro-pore texture characteristics of the concrete. Micro-pore textures of concretes of different mixing ratios and curing time were measured via mercury intrusion porosimetry (MIP), and the thermal expansion coefficient was determined by the comparator. The analysis of test results ind

APA, Harvard, Vancouver, ISO, and other styles

40

Ke, Chang Jun, Hao Wang, and Tao Ke. "Activation Mechanism of Cement Paste for Waste Concrete Autoclaved Products." Advanced Materials Research 168-170 (December 2010): 949–53. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.949.

Full text

Abstract:

studied types and amount of hydration products in cement paste in waste concretes and effect of the cement paste in waste concrete for compressive strength of autoclaved waste concrete samples simulated by hydrated cement with X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Infrared Spectroscopy (IR). The results showed, compressive strength of autoclaved waste concrete products increased with cement paste in waste concrete increasing, and the effect reduced obviously when amount of cement paste exceed 12.5% in waste concrete. Cement paste calculated amount exceeds 12.5% accord

APA, Harvard, Vancouver, ISO, and other styles

41

Nielsen, Claus Vestergaard. "Activation Energy for the Concrete Maturity Model – Part 2: New Model for Temperature Dependent Ea." Nordic Concrete Research 62, no. 1 (2020): 107–24. http://dx.doi.org/10.2478/ncr-2020-0010.

Full text

Abstract:

AbstractThe article addresses the modelling of the maturity of concrete. The apparent activation energy is the backbone of the Arrhenius model, which is typically used to model the maturity of concrete. The maturity (or the equivalent age) is influenced by the curing temperature and it is applied when modelling the hydration process and the hardening of concrete for instance in order to forecast the early-age strength to determine the time for removal of formwork or the time for prestressing. Part 1 of the article describes the background for the maturity model and the tests carried out as par

APA, Harvard, Vancouver, ISO, and other styles

42

Prayogo, Doddy. "Metaheuristic-Based Machine Learning System for Prediction of Compressive Strength based on Concrete Mixture Properties and Early-Age Strength Test Results." Civil Engineering Dimension 20, no. 1 (2018): 21. http://dx.doi.org/10.9744/ced.20.1.21-29.

Full text

Abstract:

Estimating the accurate concrete strength has become a critical issue in civil engineering. The 28-day concrete cylinder test results depict the concrete's characteristic strength which was prepared and cast as part of the concrete work on the project. Waiting 28 days is important to guarantee the quality control of the procedure, even though it is a slow process. This research develops an advanced machine learning method to forecast the concrete compressive strength using the concrete mix proportion and early-age strength test results. Thirty-eight historical cases in total were used to cre

APA, Harvard, Vancouver, ISO, and other styles

43

Obayes, Osamah, Emad Gad, Tilak Pokharel, Jessey Lee, and Kamiran Abdouka. "Evaluation of Concrete Material Properties at Early Age." CivilEng 1, no. 3 (2020): 326–50. http://dx.doi.org/10.3390/civileng1030021.

Full text

Abstract:

This article investigates the development of the following material properties of concrete with time: compressive strength, tensile strength, modulus of elasticity, and fracture energy. These properties were determined at seven different hydration ages (18 h, 30 h, 48 h, 72 h, 7 days, 14 days, 28 days) for four pure cement concrete mixes totaling 336 specimens tested throughout the study. Experimental data obtained were used to assess the relationship of the above properties with the concrete compressive strength and how these relationships are affected with age. Further, this study investigat

APA, Harvard, Vancouver, ISO, and other styles

44

Li, Yun Feng, Dong Sheng Zhang, and Li Xu. "Early Age Cracking Characteristic of Concrete with Compound Admixtures." Applied Mechanics and Materials 325-326 (June 2013): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.71.

Full text

Abstract:

The shrinkage cracking of concrete plays an important role to the accelerated deterioration and shortening the service life of concrete structures. The mineral admixture will be a perfect component of high performance concrete and its utilization will be a valuable resource for recycling. Early age cracking characteristics of concrete with compound admixtures, such as steel slag, blast furnace slag, fly ash, are studied in this paper using plate test method. The better anti-cracking performance of concrete will be realized when blast furnace slag replacing cement at 30%, steel slag and fly ash

APA, Harvard, Vancouver, ISO, and other styles

45

Santor, M. S., A. L. G. Gastaldini, C. Crauss, G. T. Dos Santos, and F. C. Rossini. "Influência de materiais de proteção na resistividade elétrica do concreto." Revista ALCONPAT 2, no. 1 (2012): 46–56. http://dx.doi.org/10.21041/ra.v2i1.26.

Full text

Abstract:

RESUMOA durabilidade das estruturas de concreto armado é resultado da ação protetora do concreto sobre a armadura. Quando a passivação do aço deixa de existir a estrutura torna-se vulnerável ao fenômeno da corrosão, cuja propagação, após iniciada é essencialmente controlada pela resistividade elétrica do concreto. O objetivo deste trabalho foi avaliar a alteração na resistividade elétrica de concretos produzidos com diferentes tipos de cimento, CP II F, CP IV e CP V, submetidos a tratamento superficial com produto obturador dos poros e argamassa polimérica. Para efeito de análise os resultados

APA, Harvard, Vancouver, ISO, and other styles

46

Bella, Nabil, Ilham Aguida Bella, and Aissa Asroun. "The Application of Equivalent Age Concept to Sand Concrete Compared to Ordinary Concrete." Advances in Civil Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8940831.

Full text

Abstract:

In this research the equivalent age concept was used, in order to simulate strength development of heat treated sand concrete compared with ordinary concrete at different temperature, 35, 55, and 70°C, and validate the simulation results with our experimental results. Sand concrete is a concrete with a lower or without coarse aggregate dosage; it is used to realize thin element as small precast prestressed beams, in injected concrete or in regions where sand is in extra quantity and the coarse aggregate in penury. This concrete is composed by principally sand, filler, superplasticizer, water,

APA, Harvard, Vancouver, ISO, and other styles

47

Liu, Xiao Yan, Kai Qiong Liu, and Ai Hua Liu. "One Monitoring Device for Concrete Early Age Shrinkage." Key Engineering Materials 492 (September 2011): 552–55. http://dx.doi.org/10.4028/www.scientific.net/kem.492.552.

Full text

Abstract:

With liquid as transmission medium, using ultrasonic precision measurement, an effective device was studied and developed for monitoring early age shrinkage of concrete. With it, shrinkage of concrete in the plastic stage could be accurately monitored. During the measurement, 0.01mm and even higher monitoring accuracy could be achieved.

APA, Harvard, Vancouver, ISO, and other styles

48

Van Tang, Lam, Chuc Trong Nguyen, Boris Bulgakov, and Anh Ngoc Pham. "Composition and early-age temperature regime in massive concrete foundation." MATEC Web of Conferences 196 (2018): 04017. http://dx.doi.org/10.1051/matecconf/201819604017.

Full text

Abstract:

The usage of monolithic concrete technology in massive structure construction has created a need for a more detailed design focused on crack control. In this study, the American standard ACI 211.1-09 and absolute volume method were used to determine the composition of heavy weight concrete for the high-rise building foundation. The concrete block temperature behavior has been analyzed by a three-dimensional thermal model in program Midas Civil. The conducted studies' result provided the possibility of obtaining heavy weight concrete from Vietnam local raw materials regarding to the concrete mi

APA, Harvard, Vancouver, ISO, and other styles

49

Folagbade, Samuel Olufemi. "Initial Surface Absorption of Cement Combination Concrete." Civil Engineering Dimension 20, no. 2 (2018): 96. http://dx.doi.org/10.9744/ced.20.2.96-101.

Full text

Abstract:

This paper investigated the initial surface absorption (ISAT) of concrete using Portland cement (PC) and some binary and ternary cement combinations containing fly ash (FA), silica fume (SF) and metakaolin (MK) as partial replacements for PC at equal water/ cement ratios and strengths. At equal water/cement ratios, the cement combination concretes have higher ISAT values than PC concrete at 28 days and the disparity reduced with increasing curing age due to improved pozzolanic reactivity of the supplementary cementitious materials. SF and MK as binary and ternary cement components performed be

APA, Harvard, Vancouver, ISO, and other styles

50

Guo, Bao Lin, Chang He Yu, Yu Han, and Ju Peng Zhu. "Long-Term Performance of Concrete Suffered Infant Age Freezing." Applied Mechanics and Materials 174-177 (May 2012): 524–29. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.524.

Full text

Abstract:

Interior water migrated towards the surface area when concrete suffered minus temperature during infant ages. Cover concrete became the worst part after the complicated process of water freezing – thawing, intermittent hydration of cementious materials and volatilization. Presentation quality, carbonization depth and rebound value in 120 d ages were observed and tested in situation. There were some calcium carbonate stains spread over the web, many swelling points and radial ice lens spread over the surface of box girder. The carbonization depth was over 10mm, and the rebound value of web conc

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!